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Features of covalent compounds:
As previously stated, the nature of bonding between constituent atoms determines the properties of compounds. As a result, covalently bound chemicals differ from ionic compounds in terms of their properties.
Physical state:
The bond can be weaker or stronger depending on the force of attraction between covalent molecules. As a result, covalent compounds exist in three states: gaseous, liquid, and solid. For example, oxygen-gas, water-liquid, and diamond-solid.
Electrical conductivity:
Covalent compounds are poor conductors of electricity because they lack charged particles (ions).
Electrical conductivity  
Melting point:
They have more moderate melting points than ionic compounds, except for a few covalent compounds (Diamond, Silicon carbide).
Diamond melting
Benzene and other non-polar solvents make covalent compounds soluble. They are insoluble in water and polar solvents.
Covalent compounds soluble  
Density, hardness and brittleness:
Hardness and brittleness are not characteristics of covalent compounds. Instead, they are soft and waxy.
Covalent compounds are like wax  
In solutions, covalent compounds undergo slow molecular reactions.